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Optimizing Regional Detention Basins for Price Expressway

by L. Steven Miller, HDR Engineering Inc, Phoenix, United States,
Jerome J. Zovne, HDR Engineering Inc, Phoenix, United States,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

Stormwater runoff from the drainage area contributing to the Price-Santan Freeway is captured in regional detention basins which require a series of pump stations for evacuation. With right-of-way cost at five dollars per square foot in this urbanized area, optimization of the basin sizes was requisite to reduce total project costs. The Corps of Engineers HEC-1 computer model was used to define the hydrology and to optimize the basin right-of-way requirements. The outlet for the drainage system is a eighteen foot diameter tunnel with outlet capacity restrictions during the peaking period of the hydrograph from the Price-Santan drainage system. A novel use of the HEC-1 model to evaluate the downstream varying capacity outlet is described in this paper.

Subject Headings: Drainage systems | Pumping stations | Computer models | Pricing | Highways and roads | Highway engineering | Drainage basins

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